Regular splined horn and hardware. Listed on Hitec website as compatible with HS-75/77/225/311/322/325/422/425/525/545/5245MG/7775MG

Five sets of 56317 oem, originally sold with 425 series Hitec servos

Each set includes:

- R-X (cross shaped horn)

- R-I (double arm horn)

- R-D (adjustable length horn)

- R-C (adjustable length horn holder)

- Four screws

- Four rubber grommets

- Four brass eyelet